1. Department of Neurology, Inselspital University Hospital Bern, Switzerland
2. Department of Neurosurgery, Hadassah Medical Center, Hebrew University Jerusalem, Israel
3. Institute for Diagnostic and Interventional Radiology and Neuroradiology, HELIOS Klinikum Erfurt, Germany
4. Institute for Diagnostic and Interventional Radiology and Neuroradiology, Stiftungsklinikum Mittelrhein Koblenz, Germany
5. Neurological Clinic, Klinikum Stuttgart, Germany
6. Neuroradiological Clinic, Klinikum Stuttgart, Germany
7. Medical Faculty, Universität Duisburg-Essen, Germany